v6.0.0 - Support for SCIP 10

We’re excited to announce a new release of PySCIPOpt adding compatibility with SCIP 10, the latest major version 🚀

The main features include support for finding IIS (Irreducible Infeasible Systems), and the possibility to solve your problem in Exact mode, without floating point precisions. You can now also use the writeStatisticsJson to get the run statistics in a json format.

Here is a list of changes:

Added

• Added support for IIS - Irreducible Inconsistent Subsystems
• Added 4 new events: TYPECHANGED, IMPLTYPECHANGED, DUALBOUNDIMPROVED, GAPUPDATED.
• Support for new implied integrality
• Wrapped varIsBinary(), varIsIntegral(), varIsImpliedIntegral(), varIsNonImpliedIntegral(), varGetImplType()
• Interfaced some exact SCIP methods
• wrapped SCIPprintStatisticsJson

Fixed

Changed

Removed

• Removed methods chgAndConsCheckFlagWhenUpgr, chgAndConsRemovableFlagWhenUpgr

v5.7.1

To correct mismatch between PyPi and Github versions.

v5.7.0

What's Changed

• Initialize stubs by @jonathanberthias in #1073
• Add back lost v5.6.0 changes by @mmghannam in #1080
• BUG: small patch to _VarArray while inputting a matrix with length > 1 by @Zeroto521 in #1060
• BUG: change the type of @ result from MatrixVariable to MatrixExpr by @Zeroto521 in #1059
• Add changelog entry for new stubs by @jonathanberthias in #1081
• API: addMatrixConsIndicator supports ExprCons by @Zeroto521 in #1047
• Feature: Speed up MatrixVariable.sum(axis=None) via quicksum by @Zeroto521 in #1078
• Fix binary operations between GenExpr and MatrixExpr by @jonathanberthias in #1071
• Use a dependency-group for testing by @jonathanberthias in #1082
• TST: test matrix.sum costing time by @Zeroto521 in #1085
• BUG: MatrixExpr can't be compared with Expr by @Zeroto521 in #1069
• attempt to fix pipelines by @Joao-Dionisio in #1087
• Fix pipelines by @Joao-Dionisio in #1088
• This is the one by @Joao-Dionisio in #1090
• Variables in exponent with basis other than e by @Joao-Dionisio in #1091
• Use optional dependencies instead of dependency groups by @jonathanberthias in #1093
• Allow to run integration tests on-demand by @jonathanberthias in #1095
• Specify test dependencies in requirements.txt files by @jonathanberthias in #1094
• Expose NODETYPE by @Joao-Dionisio in #1096
• Feature: MatrixVariable supports numpy broadcast feature by @Zeroto521 in #1092
• Fix dependencies installation when building wheels by @jonathanberthias in #1100
• Add wrappers for methods used in node selection by @mmghannam in #1099
• Fix the case of returning none from the nodeselect callback by @mmghannam in #1102
• Detect SCIP installation in conda environment if SCIPOPTDIR is not defined by @mmghannam in #1103
• Add the hybrid estimate in C-SCIP as an example by @mmghannam in #1104
• Update GH Actions macOS runner, update cibuildwheel for Python 3.14 build by @mkoeppe in #1105
• update setup.py w.r.t. SCIP 10 by @pfetsch in #1106
• Add three functions for variables by @pfetsch in #1107
• Update stubs with node selection methods by @jonathanberthias in #1101
• Some variable stubs by @Joao-Dionisio in #1110
• Manage benders subproblems memory in the master scip instance by @mmghannam in #1111

New Contributors

• @jonathanberthias made their first contribution in #1073

Full Changelog: v5.6.0...v5.7.0

v5.6.0

What's Changed

• release candidate by @Joao-Dionisio in #987
• Add support for knapsack constraints by @Joao-Dionisio in #975
• Fix some typos in the documentation by @Joao-Dionisio in #995
• Add missing numerical access functions by @chrhansk in #996
• Add feastol numerics checks by @Joao-Dionisio in #997
• Remove bogus execute permission and shebang line from sudoku example by @musicinmybrain in #1008
• Add venv instructions by @Joao-Dionisio in #1007
• Require binary variables in logical constraints by @Joao-Dionisio in #1005
• Fix tutorial model by @aapeliv in #1012
• Support for AND-constraints by @Joao-Dionisio in #980
• Feature: new method addMatrixConsIndicator by @Zeroto521 in #1024
• Feature: Matrix sum method supports arguments inputting by @Zeroto521 in #1025
• Documentation Suggestions for build.rst and lp.pxi by @gtjusila in #1026
• Add SCIPvarMarkRelaxationOnly by @Joao-Dionisio in #1023
• Interface SCIPgetNLPBranchCands by @Joao-Dionisio in #1029
• Add getConsVals by @Joao-Dionisio in #1033
• Recipe for getting local constraints by @Joao-Dionisio in #1014
• Make pipeline more verbose by @Joao-Dionisio in #1037
• Add enableDebugSol following discussion on mailing list by @Joao-Dionisio in #1013
• Fix pipeline by @Joao-Dionisio in #1042
• Add getVarPseudocostScore and getVarPseudocost by @sirenard in #1041
• Fix debug command by @Joao-Dionisio in #1027
• API: addMatrixCons supports ExprCons by @Zeroto521 in #1036
• Add getNBranchings and getNBranchingsCurrentRun by @sirenard in #1049
• BUG: _VarArray can't handle MatrixVar by @Zeroto521 in #1044

New Contributors

• @musicinmybrain made their first contribution in #1008
• @aapeliv made their first contribution in #1012
• @Zeroto521 made their first contribution in #1024

Full Changelog: v5.5.0...v5.6.0

v5.5.0

What's Changed

• Antonia errors after using the tutorial by @Opt-Mucca in #960
• Add getLinearConsIndicator by @Opt-Mucca in #961
• Fix minor typos in docstring and separator documentation by @Joao-Dionisio in #963
• add parameter set and get functions for lpi by @lidingxu in #965
• More LPI functions and optimality check by @lidingxu in #967
• Fixed bug when accessing matrix variable attributes by @Joao-Dionisio in #970
• update github actions by @Joao-Dionisio in #976
• Update INSTALL.md by @Joao-Dionisio in #974
• Don't run tests on draft PRs by @Joao-Dionisio in #979
• Add access functions for row duals by @chrhansk in #986
• Add deactivatePricer by @Joao-Dionisio in #973
• Fix master compatibility by @DominikKamp in #988

New Contributors

• @lidingxu made their first contribution in #965
• @chrhansk made their first contribution in #986

Full Changelog: v5.4.1...v5.5.0

v5.4.1

What's Changed

• Expose Matrix types by @mmghannam in #959

Full Changelog: v5.4.0...v5.4.1

v5.4.0

What's Changed

• Add node cutoff by @Joao-Dionisio in #953
• Update README with usage request by @Joao-Dionisio in #952
• Add major / minor / tech versions by @Opt-Mucca in #956
• Added option for getting Lhs, Rhs of nonlinear constraints by @Joao-Dionisio in #935
• Fix syntax highlighting in README by @mmghannam in #958
• New matrix variable functionality by @Joao-Dionisio in #957

Full Changelog: v5.3.0...v5.4.0

v5.3.0

What's Changed

• Update steps to update documentation by @mmghannam in #925
• Primal-dual evolution event handler recipe by @Joao-Dionisio in #916
• Add _createConsBasicLinear by @Joao-Dionisio in #917
• solve problem with multi-threads by @liangbug in #918
• Allow writeProblem to write to stdout by @Joao-Dionisio in #926
• Added categorical data example by @Joao-Dionisio in #932
• Updates mac script to use precompiled version by @Opt-Mucca in #933
• Correct output redirection by @DominikKamp in #929
• Generic indicator names by @Joao-Dionisio in #930
• Add transformed option to getVarDict by @Joao-Dionisio in #934
• Fixed categorical data example #932 by @Jiunixo in #939
• add support for [get|set]HeurTiming by @pfetsch in #940
• Don't run extensive tests on every PR by @mmghannam in #943
• Added utility interface to SCIP for copyLargeNeighborhoodSearch and its prerequisites by @stefanmaak in #942
• Add type to loop variables only by @Joao-Dionisio in #947
• Mt/release 5 3 0 by @Opt-Mucca in #950

New Contributors

• @DominikKamp made their first contribution in #929
• @Jiunixo made their first contribution in #939
• @stefanmaak made their first contribution in #942

Full Changelog: v5.2.1...v5.3.0

v5.2.1

What's Changed

• Add parser to read SCIP statistics by @Joao-Dionisio in #859
• Relax stage for checking getObjVal, getVal by @Joao-Dionisio in #872
• Move doc generation to separate workflow by @mmghannam in #877
• Strong Branching by @Opt-Mucca in #873
• Adds bipartite graph function by @Opt-Mucca in #874
• Add release guide by @mmghannam in #878
• Fix path where version is loaded by @mmghannam in #879
• Expand getStatistics to allow unbounded, infeasible, and user-interrupted problems by @Joao-Dionisio in #871
• Bump actions/download-artifact from 3 to 4.1.7 in /.github/workflows by @dependabot in #886
• Add prototype for utils functions by @Joao-Dionisio in #880
• Migrate to Readthedocs and Sphinx by @Opt-Mucca in #890
• Add readthedocs.yaml by @Opt-Mucca in #891
• Remove import pyscipopt by @Opt-Mucca in #892
• Add pyscipopt as docu requirement by @Opt-Mucca in #893
• Update README with new docs. Move CONTRIBUTING to docs by @Opt-Mucca in #894
• Easier way to attach event handlers by @mmghannam in #895
• Add list of contributors by @Opt-Mucca in #897
• Add documentation for event handlers by @mmghannam in #898
• Update recommended version. We're currently on 9.1.0 by @Opt-Mucca in #899
• Change min requirement again by @Opt-Mucca in #900
• Change docstring style to numpydocs by @Opt-Mucca in #901
• Add dislcaimer. Remove incorrect warning by @Opt-Mucca in #902
• Remove duplicate entry in CHANGELOG by @Joao-Dionisio in #903
• Update README.md by @Joao-Dionisio in #904
• Update tutorial to include parameter emphasis and setting by @Joao-Dionisio in #909
• Change theme of documentation by @Opt-Mucca in #911
• Add sphinxcontrib.jquery for new theme by @Opt-Mucca in #912
• Update theme by @Opt-Mucca in #913
• Add comments from dominik by @Opt-Mucca in #914
• Update to 5.2.0 by @Opt-Mucca in #920

New Contributors

• @dependabot made their first contribution in #886

Full Changelog: v5.1.1...v5.2.1

v5.1.1

What's Changed

• Add check for pt_PT in test_locale by @Joao-Dionisio in #841
• add support for disjunction constraints by @ctdunc in #837
• Add getnorigconss by @Opt-Mucca in #845
• Fix locale fix by @Joao-Dionisio in #843
• Add verbosity argument to writeParams and writeProblems by @Joao-Dionisio in #844
• Wrapped createOrigSol by @Joao-Dionisio in #848
• Minor changes to test_pricer by @Joao-Dionisio in #852
• Add recipe for getting infeasible constraints by @Joao-Dionisio in #857
• Add SCIPprintExternalCodes by @Opt-Mucca in #860
• Add SCIP_STATUS_(PRIMAL;DUAL)LIMIT by @Opt-Mucca in #864
• Mt/status limits by @Opt-Mucca in #865
• Release workflow based on manual input by @mmghannam in #866
• Fix release workflow & control uploading to pypi with a parameter by @mmghannam in #867
• More fixes to the release workflow by @mmghannam in #868
• Better way to mark release mode in pyproject & Ability to upload to test-pypi from workflow by @mmghannam in #869
• Update changelog & version by @mmghannam in #870

New Contributors

• @ctdunc made their first contribution in #837

Full Changelog: v5.0.1...v5.1.1